Trailer king pin lock



FIG. 1 is a perspective view of a trailer king pin lock embodying my design;

FIG. 2 is an end elevational view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is an end elevational view thereof opposite to that shown in FIG. 2. 

The ornamental design for a trailer king pin lock, as shown. 